In Vietnam, Windows 7 or even Windows XP is still strong.
Perhaps this is the time when Microsoft needs to shake hands more closely with software developers. Software in newer versions that do not support older platforms will probably be the best knife to solve the situation. However, it is more difficult to convince them to switch to the new operating system if they only use computers to access Facebook or check mail or at the same time read newspapers. With Microsoft, they will probably offer a more "decent" Office suite that doesn't support older Windows versions, but perhaps this is not feasible when the old Office version also satisfies many users.
Better, newer Office is probably the emergency exit.
The start button is probably the most obvious change of Windows 8.1, Microsoft has actively changed, so can Windows 8.1 save the current situation? This is clearly an unimportant task of this new version. Windows now really needs a strong kick.